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EU Eu n 1: a bivalent and trivalent metallic element of the rare earth group [synonym: {europium}, {Eu}, {atomic number 63}] 2: an international organization of European countries formed after World War II to reduce trade barriers and increase cooperation among its members; "he tried to take Britain into the Europen Union" [synonym: {European Union}, {EU}, {European Community}, {EC}, {European Economic Community}, {EEC}, {Common Market}, {Europe}] Eu \Eu\ n. (Chem.) the chemical symbol for Europium, an element with atomic number 63 and atomic weight 151.96. Syn: Europium. [PJC] Eu \Eu\ [Gr. e'y^ well, orig. neut. of e'y`s good; prob. connected with Skr. su, from the same root as E. is; or with Skr. vasu good, prob. fr. the same root as E. was.] A prefix used frequently in composition, signifying well, good, advantageous; -- the opposite of dys-. [1913 Webster] |
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